| Betula B RTM Company Limited | Households | 2016 |
| Between SLP Limited | Education | 2025 |
| Betz Trade Ltd | Wholesale & retail | 2021 |
| Beulah Development Limited | Real estate | 2020 |
| Beulah Trading Limited | Agriculture & fishing | 2015 |
| Beurbest Ltd | Education | 2013 |
| Bevalex Limited | Wholesale & retail | 2014 |
| Bevamed Limited | Health & social care | 2019 |
| Bevan Way Management Company Ltd | Households | 2025 |
| Beverley Bioenergy Ltd | Energy | 2026 |
| Beverly Holdco Ltd | Financial services | 2023 |
| Bevex Technologies Ltd | Information & communication | 2026 |
| Bevitt Trading Limited | Professional & scientific | 2021 |
| Bewsey Estates Limited | Real estate | 2017 |
| Bexfield Properties Limited | Real estate | 2010 |
| Beximport Ltd | Real estate | 2025 |
| Bexley Bridgewater Limited | Real estate | 2025 |
| Bexleys Ltd | Wholesale & retail | 2005 |
| Bexy Voyage Limited | Transport & logistics | 2026 |
| BEY Trade&Logistics Ltd | Wholesale & retail | 2025 |
| Beyond Advice Group Ltd | Financial services | 2014 |
| Beyond Beautiful 2 Ltd | Other services | 2018 |
| Beyond Beautiful Wellness Clinic Ltd | Health & social care | 2023 |
| Beyond Books Media Ltd. | Arts & recreation | 2016 |
| Beyond Bricks Property Investment Ltd | Real estate | 2024 |
| Beyond Bricks Property Management Ltd | Households | 2024 |
| Beyond Brickwork Ltd | Construction | 2022 |
| Beyond Echo PR Limited | Professional & scientific | 2023 |
| Beyond Food Liverpool Ltd | Hospitality | 2025 |
| Beyond Group Liverpool Ltd | Other services | 2022 |
| Beyond Midwives Limited | Health & social care | 2023 |
| Beyond Mobility North Ltd | Wholesale & retail | 2026 |
| Beyond Relations Ltd | Information & communication | 2025 |
| Beyond the Pines Ltd | Arts & recreation | 2021 |
| Beyoutiful Salon Ltd | Other services | 2017 |
| Bezo Construction Limited | Construction | 2019 |
| Bezo Ltd | Construction | 2017 |
| Bezy Holding Ltd | Construction | 2020 |
| BF (Baltic) Limited | Administrative & support | 2022 |
| BFB North West Ltd | Construction | 2018 |
| BFC SD Ltd | Hospitality | 2024 |
| BFI 2 Ltd | Real estate | 2026 |
| BFI 25/27 SS Ltd | Real estate | 2018 |
| Bfpp Holdings Limited | Manufacturing | 1991 |
| BFS Marine Finance (Holdings) Limited | Financial services | 2022 |
| BFS Marine Finance (UK) Limited | Financial services | 2022 |
| BFT Consult Ltd | Professional & scientific | 2014 |
| BG Consultancy NW Limited | Professional & scientific | 2024 |
| BG Property Estate Limited | Households | 2023 |
| BG Rentals Limited | Real estate | 2023 |
| BG Shop Ganchevi Limited | Wholesale & retail | 2025 |
| BGD Ltd | Construction | 2025 |
| BGD Property Holdings Ltd | Real estate | 2025 |
| Bgmc Properties Ltd | Real estate | 2024 |
| BGS Giam Ltd | Arts & recreation | 2016 |
| BGS Trading (UK) Ltd | Administrative & support | 2009 |
| BGT Fuel Cells UK Limited | Professional & scientific | 2022 |
| BH10 Limited | Financial services | 2024 |
| BHA Properties Limited | Construction | 2009 |
| Bhanu Services Ltd | Hospitality | 2024 |
| Bhanu Solutions Limited | Information & communication | 2025 |
| Bhavani Properties & Consultancy Ltd | Real estate | 2002 |
| Bhayani Vision Care Ltd | Health & social care | 2026 |
| BHB Supplies Ltd | Wholesale & retail | 2020 |
| BHD 2018 Limited | Real estate | 2018 |
| BHF LEE Ltd | Information & communication | 2021 |
| BHN East Turnberry Park Management Company Limited | Households | 2007 |
| Bhookie Ltd | Hospitality | 2025 |
| Bhotel Limited | Information & communication | 2006 |
| BHP Sound Post Ltd | Information & communication | 2022 |
| BHU Ltd | Transport & logistics | 2018 |
| BI Hamburg Ltd | Information & communication | 2020 |
| BI4FUTURE Ltd | Wholesale & retail | 2018 |
| Biamar Services Ltd | Construction | 2015 |
| Bianca Walkden Limited | Arts & recreation | 2017 |
| Bibby & Co (North West) Holdings Limited | Real estate | 2015 |
| Bibby & Co (North West) Ltd | Professional & scientific | 2007 |
| Bibby & Co (NW) Holdings Limited | Professional & scientific | 2015 |
| Bibby & Co Financial Planning Ltd | Financial services | 2024 |
| Bibby Asset Finance Limited | Financial services | 2000 |
| Bibby Bergen Limited | Transport & logistics | 2015 |
| Bibby Bros. & Co. (Management) Limited | Administrative & support | 1978 |
| Bibby Commercial Finance Limited | Financial services | 2001 |
| Bibby Contracting Limited | Construction | 2011 |
| Bibby Ecowave Limited | Transport & logistics | 2025 |
| Bibby Energy Solutions Ltd | Energy | 2022 |
| Bibby Factors Bristol Limited | Financial services | 1996 |
| Bibby Factors International Limited | Financial services | 2000 |
| Bibby Factors Leicester Limited | Financial services | 1994 |
| Bibby Factors Limited | Financial services | 1957 |
| Bibby Factors Northeast Limited | Financial services | 1998 |
| Bibby Factors Northwest Limited | Financial services | 1955 |
| Bibby Factors Slough Limited | Financial services | 1991 |
| Bibby Factors Sussex Limited | Financial services | 1999 |
| Bibby Factors Wessex Limited | Financial services | 2003 |
| Bibby Factors Yorkshire Limited | Financial services | 2003 |
| Bibby Family Company Limited | Professional & scientific | 2021 |
| Bibby Finance Solutions Ltd | Financial services | 2009 |
| Bibby Financial Services (Europe) Limited | Financial services | 2015 |
| Bibby Financial Services (FX) Limited | Financial services | 2014 |